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Acidosomes are relatively large vesicles that are distinguished by
having inward indentations of their membranes. Acidosomes move from
the cytosol along the cytopharyngeal microtubular ribbons where they
dock at the nascent digestive vacuole membrane. This micrograph is of
a cell that was exposed to 0.1µm latex beads which are found in the
forming vacuole’s lumen. At least six large acidosomes are docked at
the cytosolic surface of the nascent vacuole. cc, cytostomal
cord; disc, discoidal vesicles; cp mt, cytopharyngeal
microtubular ribbons; fr, filamentous reticulum; qu,
quadrulus. EM taken on 7/7/80 by R. Allen with Hitachi Hu11A TEM. Neg.
12,250X. Bar = 0.5µm. Published in Eur. J. Cell Biol. 29:150-158,
1983.
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